package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DIshServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //向菜品表插入一条数据

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.insert(dish);

        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();



        if(flavors!=null&&flavors.size()>0){
            for(DishFlavor f : flavors) {
                f.setDishId(dishId);
            }
            dishFlavorMapper.insertBatch(flavors);
        }


        //向口味表插入n条数据
    }

    //菜品分页查询

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    //菜品批量删除

    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否在起售中
        for(Long id : ids){
            Dish dish= dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //菜品是否被套餐关联

        List<Long> setmealIds= setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品关联的口味数据
        dishMapper.deleteById(ids);
        for(Long id : ids){
            dishFlavorMapper.deleteByDishId(id);
        }

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish= dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors= dishFlavorMapper.getByDishId(id);
        //将查询到的数据进行封装
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        BeanUtils.copyProperties(dishFlavors,dishVO);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品表基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            for(DishFlavor f : flavors) {
                f.setDishId(dishDTO.getId());
            }
            dishFlavorMapper.insertBatch(flavors);
        }
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Integer id) {
        dishMapper.startOrStop(status,id);
    }

    @Override
    public List<Dish> list(Long categoryId) {
        List<Dish> dishList=dishMapper.getByCategoryId(categoryId);
        return dishList;
    }
}
